Vibratory circuit converter



Oct. 19, 1948. 4 H, J, WlgE 45mm VI BRATORY CIRCUIT CONVERTER Filedbec. 1, 1944 2 sneetsheet 1 L89 3 L90 l r 9\ 1 l 17 1B 2 i l 907]- 13 if /lg f 6* BV WFM UNITED STAT Patented Oct. 19, 1948 VIBRATORY CIRCUIT CONVERTER nemen J. wise, indianapolis, ma., minor to Electronic Laboratories, Incorporated, Indianspoils, Ind., a corporation of Indiana Application December 1, 194.4, Serial No. 586,128

My present invention relates to improvements in vibrator interrupting systems designed primarily for changing the current of one type to that of another, as for instance the changing of direct current from a suitable direct current source into alternating current for operating a load, .or for changing the voltage of a current source to a different voltage for operating a suitable load requiring a modified voltage from that originally delivered by the source.

One of the objects of my invention is to provide a system of the above identified-character, whereby a relatively high input voltage may be handled in a vibrating interrupter system without damage to the vibrating ,interrupter apparatus or to the contacts of the vibrating inter- Another object ofthe invention is 4to provide a system of the above identified character, whereby relatively high' voltages maybe handled by the vibrating interrupter or vibratinginterrupters of the system without disruptive arcing at the contact point of the vibrating interrupter.

A still further object of my invention is the provision of a vibrating interrupter system,

whereby the vibrating interrupter may handle wide uctuations in the input circuit without danger to the vibrating interrupter and without disruptive effects on the vibrating interrupter.

Other objects and advantages of my invention will appear more fully hereinafter in the accompanying specification and appended claims.

For th'e purpose of disclosing my invention, I have illustrated certain embodiments shown in the accompanying drawings, In which:

Fig. 1 is a diagrammatic view of a vibrating interrupter system, embodying my invention;

Fig. 2 is a diagrammatic view of a modified form of my vibrating interrupter system, wherein the peak inverse voltage is half that of the peak inverse of the, system illustrated in Fig. l;

Fig. 3 is a diagrammaticview of a vibrating interrupter circuit, wherein the advantages of my invention may be obtained in a reactifying circuit; and

Fig. 4 is a diagrammatic view of a further modi.- Iled system, such as is disclosed in Fig. 3.

Referring to th'e drawings and the various modiilcations as illustrated, in Fig. 1, I provide a transformer I having a secondary coil or winding 2 and a pair of primary coils or windings 3 and 4, each having a center tap, providingin the `winding 3, two winding sections 5 and 6 and in the winding 4 two similarsections 1 and B. The center tap 9 of the winding 3 is connected to one side 3 Claims. (Cl. 171-97) tact I9.

III of the input circuit side of the circuit, which input side may be connected to any suitable source of direct current supply. The center tap II or the winding 4 is connected to the other side I2 of the input circuit.

Cooperating with the transformer I is a vibrating interrupter I3 having a vibrating reed I4. This reed is adapted to vibrate between pairs of relatively stationary contacts, so that contacts I3 and I6 of the reed are adapted to engage alternately contacts I1 and I8 on one side of the reed and contacts I9 and 20 on the opposite side of the reed.

The outer terminal 2l of the winding 3 is suitably connected to the contact I1, while the outer terminal 22 of this winding is connected with con- The outer terminal 23 of the winding 4 is connected to the contact 20. while the outer terminal 24 thereof is connected to contact I3. Therefore, during the vibration of the reed I4. when contacts Il and I6 are in engagement with contact I1 and I l current will now through the sections l and 8 of windings 3 and 4 in one dI- rection, indicated by the arrows. When the reed I4 moves in the opposite direction causing con tacts I5 and I6 to engage contacts Il and 20 current will be caused to ow through the winding sections B and 1 in the opposite direction. In

each' instance, the winding sections of the two windings 3 and 4 will be in series and therefore the number oi turns in each winding section may be half the number of turns of that required in a conventional system, and as a result the peak lnverse vvoltage across the oppositely disposed relatively stationary contacts will be cutin half.

In the system, for driving the vibrating reed I4, I provide a driving magnet having a driving coil 25, one terminal of which is connected to a relatively stationary contact 28 adapted normally to engage a contact 21 of the reed I4. This contact 21, through' the reed I4, is connected through a resistance 28 with one side I2 ci the input circuit. The opposite terminal of the winding 2l is connected through resistance 29 with the other side I0 of the input circuit. The resistances are used as a voltage divider to supply the driving magnet with a voltage lower than the input voltage to permit the use of a relatively low voltage coil. These resistances also isolate the center reed from the transformer windings. Therefore, when the circuit is initially closed, the reed I4 will be moved in a direction to open its own cir.'- cuit and at the same time engage contacts Il and It with contacts I1 and I8. 0n its rebound, the

Jreed I4 will engage contacts I5 and I3 with contacts I9 and 20 and again close its circuit.

In the system illustrated in Fig. 2, I have shown a system whereby the voltage across each winding section is still further reduced. In the system illustrated in Fig. 2, th'e transformer I with its secondary 2 is provided with i'our primary windings 30, 3I, 32, and 33, each winding having a center tap so that the winding 30 will be provided with two sections 34 and 35; the winding 3| will be provided with two sections 33 and 31; the winding 32'will be provided with sections 33 and 39 and the winding 33 will be provided with sections 40 and 4I.

The vibrating interrupter I3 is provided with two vibrating reeds 42 and 43. 'I'he vibrating reed 42 being provided with contacts 44 and 45 and the reed 43 being provided with contacts 43 and 41. The contacts 44 and 45 make contact, when moved in one direction, with the relatively stationary contacts 43 and 49, disposed on one side of the reed, and when moved in the opposite direction make contact with the relatively stationary contacts 50 and 5| disposed on the opposite side of the reed. The reed 43 vibrates in unison with the reed 42 and when the reed 42 is moved into engagement with contacts 48 and 49, the reed 43 will be moved to cause contacts 43 and 41 to engage contacts 32 and 53 disposed on one side of the reed and when moved in the opposite direction will engage contacts 54 and 55 disposed on the opposite side of the reed.

The center tap 53 of the winding 30 is connected to one side I of the input circuit. The

outer terminal of the winding section 34 is con- For driving the two reeds 42 and 43, which are mechanically connected. I provide a driving m88- net having a coil 60. One terminal oi this coil is connected with one side i2 of the input circuit, a resistance winding 33 being included in the circuit. The opposite terminal of the winding 33 is connected to the opposite side i0 of the input ciricuit, a resistance 34 being included in this circu t.

In the system illustrated in Fig. 3, I have shown a system wherein I provide for a change of voltage without changing the character of the current, while maintaining all of the 'advantages oi my invention. In this system, I provide a transformer 35 having a split primary winding or coil 33. The center tap of this coil 33 is connected to one terminal I0 of the input circuit. One outer nected to the relatively stationary contact 43.

The outer terminal of the section of the winding 33 is connected to the relatively stationary contact 50, The center tap 53 of the winding 3| is connected to the center tap- 51 of the winding 32. The outer terminal of the Winding section 33 is connected to the relatively stationary contact 5I, 'while the outer terminal of the winding section 31 is connected to the relatively stationary contact 49.

The outer terminal of the winding section 33 of winding 32 is connected to the relatively stationary contact 52, while the outer terminal of the winding section 39 is connected to the relatively stationary contact 54. The center tap 59 of the winding 33 is connected to the other side -I 2 oi' the input circuit while the outer terminal of the winding section 40 is connected to the relatively ystationary contact 55 and the outer terminal of the section 4| is connected to the relatively stationary contact 53.

Therefore, when the contacts 44 and 45 are in engagement with contacts 43 and 49 and simultaneously contacts 43 and 41 are in engagement with the contacts 52 and 53, current will now from the input side oi the circuit through they winding sections 34, 31, 33, and 4| in series in the direction indicated by the arrows. Likewise. when the contacts 44 and 45 oi' the reed 42 and 43 and 41 oi the reed 43 are simultaneously engaged with contacts and 5I and 54 and 55, current will flow from the input side of the circuit through winding sections 35. 33, 39, and 40 in the directionof the arrows, which is the opposite direction to that of the current ow irst indicated, thereby inducing an alternating current in the secondary winding 2. Since the four windings are connected in series, the voltage across each winding is one-fourth, thus dividing the peak inverse voltage across the contacts by four.

terminal of the coill or windingI is connected to a pair of relatively stationary contacts 31 and 33, disposed on one side of a vibrating center reed 39 and the opposite terminal of the winding 33 is connected to a pair of contacts 13 and 1I disposed on the opposite side of the reed 39. These sets of contacts are adapted to be engaged by contacts 12 and 13 on the reed 39 which are vin turn connected through the reed with the opposite terminal I2 of the input circuit. This reed 39 is driven by driving contact having a coil 14, one terminal of which is connected to a contact 15 normally in engagement with the contact 13 on the reed 69, the opposite terminal of the coil being connected to the input terminal I0 of the input side of the circuit. Therefore, as the reed is vibrated between the relatively stationary contacts, current will flow alternately and in opposite directions through the winding sections of the primary winding 36, inducing an alternating current in the secondary windings of the trans` former.

The secondary, which is adapted to be connected to the load, is provided with a pair oi' coils or windings 11 and 18 each having a center tap adapted to be connected to one terminal oi' the load and dividing the windings into sections. The outer terminal of the section 19 of the winding 11 is connected to a relatively stationary contact 30 while the opposite terminal of the other section 3| of the winding 11 is connected to a relatively stationary contact 32, disposed in opposlte relation with respect to the contact 33 and these two contacts are adapted to be alternately engaged by the contact 38 on the reed 39. 'I'here-` fore, during the vibration of the reed 39,4 while an alternating current is inducedgin the windings 11 and 13 of the secondary, this current being induced in the sections 33 and 19 in onel direction and `thenthe opposite direction in sections 13 and 3|, as indicated by the arrowsI is rectilied to deliver the sameA type of current to the load as that supplied from the direct current source 'of supply at the desired voltage.

In the system illustrated in Fig. 4, substantially the same arrangement as that shown in Fig. 3 is illustrated, except that in the system illustrated in Fig. 4 the primary and secondaries are isolated from one another due to the fact that the reed structure comprises a pair of vibrating reeds 39 and 39', which are electrically separated from one aration of the contacts.

another, but mechanically connected so that they will vibrate with unison. f

Suitable buffer condensers 89 are connected across the terminals of the primary windings to sustain the voltage during the off interval of the vibrating contacts. Likewise, suitable condensers i 9U are connected across the vibrating and stiationary contacts to prevent arcing upon the sep- Likewise, suitable ccndensers 9| and resistors 92 are connected across the driver contact points to preventl arcing upon the separation of the contacts.

I claim:

1. In a transformer system, in combination, a transformer having primary and secondary windings, one of said windings including a iirst and a second coil, each coil having Ya center tap dividing ea-ch coil into first and second sections, the center tap of one coil being adapted to be connected to one side of a line and the center tap of the other coil being adapted to be connected to theother side of a line, a vibrating interrupte'r including a pair of contacts, one of said contacts being connected to the outer terminal of the first coil and the other contact being connected to the opposite outer terminal of the second coil` and a second pair of contacts, one of said second pair of contacts being connected to the other outer terminal of the first coil and the other of said second pair of contacts being connected to the other outer terminal of said second coil and a vibrating reed operating between said pairs of contacts and alternately connecting the contacts of each pair.

2. In a transformer system, in combination, a transformer having primary and secondary windings, one'of said windings including two coils, each coil having a center tap adapted for connection with a line terminal, a pair of contacts connected tothe opposite outer terminals of each of said coils, a second pair of contacts, each connected to the other outer terminals of said coils and a vibrating reed operating between the pairs of contacts and alternately connecting the contacts of each pair.

3. In a transformer system in combination, a transformer having a primary and a secondary winding, said primary winding having a center tap connected to one side of a source of direct current supply and its outer terminals respectively connected to oppositely disposed contacts, said secondary winding including a first and second coil, each coil having a center tap dividing each coil into rst and second section, the center tap of one coil being adapted to be connected to one side of the load circuit and a center tap of the othery coil being adapted to be connected to the other side of a load circuit, a pair of contacts, one of said contacts being connected to the outer terminal of the rst secondary coil and the other contact being connected to the opposite outer terminal of the second secondary coil, a second pair of contacts, one of said second pair of, contacts being connected to the other outer terminal of the first secondary coil and the other of said second pair of contacts being connected to the other outer terminal of the second secondary coil and a vibrating reed operating oetween the contacts connected to the outer terminal of the primary winding and alternately connecting the outer terminals of the primary winding with one side of the line and between said rst and second pairs of contacts and alternately connecting the contacts of each pair.

HERMAN J. WISE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Great Britain Sept. 19, 1918 Number l Number 

